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  Long-range temporal correlations in alpha and beta oscillations: Effect of arousal level and test–retest reliability

Nikulin, V. V., & Brismar, T. (2004). Long-range temporal correlations in alpha and beta oscillations: Effect of arousal level and test–retest reliability. Clinical Neurophysiology, 115(8), 1896-1908. doi:10.1016/j.clinph.2004.03.019.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4166-C Version Permalink: http://hdl.handle.net/21.11116/0000-0001-6B90-4
Genre: Journal Article

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 Creators:
Nikulin, Vadim V.1, Author              
Brismar, T., Author
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1External Organizations, ou_persistent22              

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Free keywords: Long-range temporal correlations; Spontaneous oscillations; Alpha and beta oscillations; Electroencephalography; Detrended fluctuation analysis
 Abstract: Objective: The aim of the present study was to evaluate test–retest reliability and condition sensitivity of long-range temporal correlations in the amplitude dynamics of electroencephalographic alpha and beta oscillations. Methods: Twelve normal subjects were measured two times with a test–retest interval of several days. Open- and closed-eyes conditions were used, representing different levels of arousal. The amplitude of the alpha and beta oscillations was extracted with bandpass filtering and the Hilbert transform. The long-range temporal correlations were quantified with detrended fluctuation analysis. Results: The amplitude dynamics of the alpha and beta oscillations demonstrated power-law long-range temporal correlations lasting for tens of seconds. These correlations were degraded in the open- compared to the closed-eyes condition. Test–retest statistics demonstrated that the long-range temporal correlations had significant reliability, which was greatest in the closed-eyes condition. Conclusions: The presence of long-range temporal correlations indicates that the amplitude of neuronal oscillations at a given time is dependent on the amplitude at times as remote in the past as tens of seconds. The reliability of long-range temporal correlations suggests that the mechanisms generating the amplitude fluctuations are not perturbed over several days. The systematic changes in the scaling exponents at different levels of arousal indicate that these changes occur on many time scales (5–80 s) as a result of modifications in the intrinsic dynamics of the neuronal oscillations. Significance: This study demonstrates that the dynamics of spontaneous neuronal oscillations possess long-range temporal correlations with properties suitable for functional and clinical studies.

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Language(s): eng - English
 Dates: 2004-03-222004-04-302004-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.clinph.2004.03.019
 Degree: -

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Title: Clinical Neurophysiology
  Other : Clin. Neurophysiol.
Source Genre: Journal
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Affiliations:
Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 115 (8) Sequence Number: - Start / End Page: 1896 - 1908 Identifier: ISSN: 1388-2457
CoNE: https://pure.mpg.de/cone/journals/resource/954926941726